Separation of aromatic isomers

Details Separation of aromatic isomers Separation of aromatic isomers

C - Chemistry, Metallurgy

07

C

183/32

C07C 7/13 (2006.01) B01J 20/18 (2006.01) C07C 7/00 (2006.01)

Patent

CA 1059928

SEPARATION OF AROMATIC ISOMERS Abstract of the Disclosure A mixture of C8 and higher aromatics, including para-xylene, meta-xylene, ortho-xylene and ethylbenzene, is separated by an adsorption/desorption procedure to provide rapid recovery of the valuable xylene components. In this process, the aromatic mixture is passed through an adsorption column, preferably containing a certain zeolite adsorbent, in which column the meta-xylene and ortho-xylene pass through relatively uninhibited, whereas the para-xylene and ethylbenzene and other aromatics are adsorbed in the column. The meta-xylene and orthoxylene are removed and distilled to effect separation. The para- xylene/ethylbenzene mixture in the column is then desorbed and separated by conventional procedures. In addition, complete and continuous procedures are also provided for maximum separa- tion of all components by operation of two or more columns in parallel in a system such that adsorption is conducted in one column while desorption is carried out in the other column.

185091

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